Telephone system.



Witnesses $0, HASTINGS.

TELEPZONB SYSTEM. I

ABPLIOATEOE FILED APR. 22, 1912.

Patented May 20, 1913.

4 SHEETS-SHEET l.

Li C. M HASTINGS.

I TELEPHONE SYSTEM.

APPLICATION rn nn APR. 22, 1912.

Patented May 20, 1913,

6 8HEETS-SHEET 2.

G. M. HASTINGS. TELEPHONE SYSTEM.

APPLIOATIOH FILED ,123.22, 1912.

Fatentefi EZEFZQ 3913.

BHEETE-BEEET 3.

v H At'tarneysi these devicesneing if desired aimless Parsons .nnion.

RUBEN C. M. HASTINGS, COLUMBUS, OHIO, ASSIGNOR TO THE INTERNATIONAL TELEPHGNE 00., OZ COLUMBUS, OHIC.

TELEPHONE SYSTEM.

nosnool.

Application filed April 22, 1912. Serial No. 692,467.-

To {ZZZ 107mm, it may concern:

Be it known that l, RUBEN C. M. Hits- TINGS, a citizen of the United v ing at Columbus, in the county of Franklin and State of Ohio, have invented a new and useful Telephone System, of which the followingis a specification.

The present invention relates to an proves device for locking out or shunting the instruments in a subscribers set in a telephone. system, the same being an automatic and synchronrms device controlled by the tl'tflt'llpttltttlfill of a selecting key mounted at the central or exchange of a telephonesysteni. whereby only two subscribers may be placed in telephonic communication at a time, the other subscribers being shunted from the line so that their instruments are plead av signal visually displayed indicating to such shunted subscribers that the line is busy "I lhisparticular form of device is adapted to be used in lieu of the device shown and described in an application for a stlOtllYt. system of telephony filed August 29, 191i, Serial Number (546,697, and particularly set. forth in an application filed on even date herewith, Serial Number (392,466 interchangeaha; but being, particularly desirable for use oi'i'"party lines in hotels otlices, suburbs and outlying systems.

ll ith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement. of parts and in the details of construction hereinafter described and claim d. it being understood that rhan t-s in the precise embodin'tent of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

in the drawings -l irure 1 a front. elevation vo1" t" pt" tuderive in normal uion. Fin. '2 is a similar view with the parts in locking out position. both clectrtnnagnets being ener l'lttl. Fig. ll is'a view taken from the right as viewed in Fig. t, Fig. 4 is a similar view with the main electrtanagnet and its support taken away with the looking out permit the shunting disk to rotate termincd distance without actuating the slun'tting crmt'acts, Fig. 5 is a top plan view thereof l iggi ti is 'a sectional view slunvine' the shunting dish with the parts ready for States, residl t t I looking out. ing the shunting disk in front elevation With the eontactsin shunt operating position. Fig. 8 is an elevation of the shunting disk operating electromagnets and their support. I lg. .9 is a diagrannnatic view-of a loop circuit telephone system with an exchange and subscribers station, with the present lock out device shown in diagram therein. Fig. 10 is adetail sectional View of the shunting disk actuating cut-out and its pin and lug. Fig". 11 is a detail view showing a. modified form of contact controlling disk,

Referring: to the drawings, the numeral 1 designate; the main supporting plate having mounted fixedly upon one side thereof near its upper end an electromagnet. or relay 2, which connected in the line and operable from the central or exchange through the medium of the selecting key set forth in detail in an application filed even date herewith, Serial No. (392,465 said relay 2 actuating the arinatiu'e 3 which is pivotally mounted to the post t and is limited in its doWnward movement by the pin 5 disposed below the local battery circuit. atthe subscribers' set, and are disposed to have. their terminals closed by the arnmture 3 when attracted by the encrgization of the relay this action closing a battery circuit including: the electromagnet. 5t carried by the post 9, intermediate oi the length of the main plate 1 and to one side of and below the relay 2.

Connected in spa ed relation to the main plate l. and mounted to retain and support the main am'nu'atus ot the device. a lramc l0. a shaft .11 being journalcd therein and to the. main plate l. its outer end extending cxteriorly of the frame and carrying thereon adja ent the framethe two ratchet wheels l2 and l t. the inner one t2 being the opeh at-ing ratchet and the outer one t l the arresting or retrtnrrade movement lH't-Yttliitlfi ratchet. livote'd at ll to the frame It) is a double lover l5. having formed integral therewith at its lower end an a mu or pawl ltl. having the weighted outer end 17 and th tooth. l8 whi h is adapted to engage. the

Patented May 20, 1913.;

Fig. 7 is a sectional view showratchet 13 and prevent overrun movement oted at 21 to the upper end of the lever, 15

is an arm or pawl 22, having the weighted terminal 23 and the ratchet engaging tooth 24, the pin 25 limiting the upward movement of the pawl and retaining it in such position as to also he in operable relation to the ratchet 12. A pawl 20 prevents the shaft 11 from slipping when not actuated by. the pawl 22.

In order to electrically control. the pawls l5 and 22 to actuate the ratchets l2 and 13 and consequently rotate the shaft 11, an armature 26 is attached to the lever at 21, and in line with the core of the electromagnet 8, which when energized attracts said armature and simultaneously operates the two pawls to rotate the shaft the distance of one tooth of the ratchet upon each energizin tion of the electromagnet 8. Carried upon the shaft 11, beyond the ratchets, is a disk 27 havingthe peripheral pins 28 and the facial pins 29, the peripheral pins being in the path of and to engage and close the pair of spring terminal contacts 30, while the facial pins are adapted to engagethe pivoted arm 81 to raise the same to engage the spring terminal contact 32 and close its circuit, this coustructitm being identical with that shown in application Serial No. 692(lt36 above referred to.

Mounted upon. the post near the plate 1 is the pair oi spring terminal contacts and 35, the free end of the contact. 34 being provided with a lock pin and a lug 36, which normally lie near the face and upon the periphery of the disk 37, which is slidably mounted upon the shait 11 near the plate 1, but is keyed thereon for rotation therewith, the periphery of this disk looing provided at equi-distant points with the slots 39 of suliicient size to permit the lock pin 86 to fit therein. Thus'when the two electromagnets 40 are energized to attract the disk 37 against the tension of the flat spring l1, so that the disk 37 is held against this pin 36, at the very instant that the disk 37 has been rotated a suiiicient distance to cause.

the slot 39 to alineuitl the pin 36 at Whatis termed zero position, the disk then moves. to throw the pin 38 within the slot and thereby permits the pin 36 to pass upon the other side of the dish so that the toothed periphery of the disk can rotate and not affect the contacts 34: and

When the disk 3-3? has rotated a suilicieut distance to bring the slot 39 to aline with the pin 36, and the electromagnets 4-0 are deenergized, the spring ll will cause the disk 37 to he moved so that the 36 and whether the line is free or l usy.,:a die noeaooa the disk 42. mounted so as tobe capable of l a slight oscillatory movement upon the shaft 11 Within. the frame 10, the .slot an'd-pin connection 13 limiting the movement of the disk 42 and its elect-roniagnet 40,- be cause the attracting or contact between the cores and the disk 37 is sutlicient to produce an adherence of them to the disk, the electromagnets are permitted to he moved a slight. distance without impeding the opera tion of the shaft 11. the spring 44 and arm 4-5 returning the disk 42 and the electromagnets $0 to the initial position at each d Einergization thereof.

The disk 87 and the terminal contacts and and the subscribers instrument form shunting means, and when the contacts closed, the; transmitter and neceiver oi the respective sets are shunted or locked out of the line, being cut oil": from all hatter source so as to be what is termed dead In order to indicate to the respective sul. scrih ers the condition of? their instrumen il? is mounted upon the extreme outer end of the shaft 11 and visible to the subscriber to indicate visually the signals F and ll, through. an aperture in the instrument not shown. By this means it'is evident that this shunting or locking out device may be applied to systems now in use or in the particular system setforth in the copending ap plicat-ion Serial No. 646 691 and that its operation will be controlled synchronously with the'selecting apparatus mounted at the exchange or central station and that when a calling and called subscriber are in. telephonic comniiunicatiou, all the remaining: subscribers are locked out, and better still, are shunted ei'iti-rely from the line, the re .moval oi": the receiver from. the hook in the With the parts in the position shown. in-

l 9, and assuming that a subscriber desires to call the exchangelto be placed into communication witi'i another subscriber, the magneto M is operated and in turn actuaeeaooe ates the signal device S, at the exchange E,

through the following eirituitzthe receiver 7 tates the shafts 11, to cause the pins 28 to hook H, the contaotpoint 72, thecondoctor 73, the subscribers call-up :iiuImQ, the con ductors 7 5 and 2, the relayg, the conductor 2', the line L, the conductor lot, thejsignal device 5%, the conductor ltl gthcoontct 62, v.

the contact 63, controlled by the lselect' ing key K and the cohducthr 162%" Thus the exchange will be notified that. a subscriber is calling and one of the jac klplugs J is inserted in the jack socket 100 and the exchange is placed in op'inmnnicationwith the calling subscriber, iv 0 after operating the magneto has removed the receiver R, from the hook H. Thet'receiver hook H rising opens the contact at 7 2 and connects the local battery'circuit to the line follows: the hook H, the contacts l8- 49, the conductor 50, the local battery B, the conductor 51,

the transmitter T, the conductor 52, the coil 53 and the conductor 5%. After the subscriber has requested the exchange to connect him with a selective subscriber, the exchange operator places the other jack plug J in the calling socket J, and then manipulates the key K. The contacts (SQ--62, are moved in the opposite direction so that contacts are alternately made at 626l, and tl2"--fi3, thus permitting the contacts 62-(54 to close an intermittent circuit to the line as follows: the Contact 64, the oonductor'65, the batteries 66, the conductor 67, the line L, the receiver hook H, the conductor 73, the call alarm 7t, the conductor 75, the con- (luctor 2 in all subscribers sets S, the relay 2, the conductor.2, the'line L, the conductor 67, and the contact 62. Thus the relay 2 is intermittently energized in all sets and actuates the armature 3. The armature 3 in each set closcs the contacts 77', and closes the following circuit: the contact 7', the conductor (39, the electromagnet' 8, the conductor 70, the battery B, the conductor 71, and the contact 7. By this circuit all elcctromagnets 8' are intermittently energized and deilnergizcd, to actuate the pawls l5 and 22 and thus rotate the shafts 11 in all sets.

In all sets, but the calling and called sets, the disk 37 will close contacts 35, and thus shunt the uncalled sets from the lines L-TL, through the conductors 67'. the contacts and the conductor 68, which as shown is bridged across the line and isolates the uncalled local battery circuits from the line. At the same time, the indicators F--B, will visually advise the uncalled sclsby display ing the segment 15 to indicate that the line is husy. c

lVllQli the disk :57 was at zero position with all pins ill) in lino with the radial slot 31), as shown in Fig. 3. the lifting of the hook in llll alling act bridged the coi'itacls 56, so that tin; cncrgization of the relay and the electroinagnet 8 iii the calling set, due to the manipulation of the key K, ro-

i close the contacts 30, but as the hooks in all but the calling sets were downQthe-electro 3 magnets to are not afiected. In the calling set, however, the electromagnets 40 were energized throu h the following circuit;

the receiver hoo' H, the'contacts 55-56, V

the conductor 57, the battery 58, the eoncluctor 59, the contacts 36 the conductor 60,

the electromag'net 40, and the conductor 61.

The clectromagnet 40 being energized attracted the disk 37 and moved the same against the tension-of thespring' 41, and so through the slot 39 and as the disli- 37 was also rotated With-the shaftll, the pin 36 passed upon the rear face of the disk 37, so that the lug 86 was placed out of contact with the periphery of the disk 37.

In all other sets, the lug 36, rode upon the periphery, and when the-notch 39, of the called set arrived in line With the lug 36, the lug 36 seated therein and thus opened the shunt connection 67-68 at consets remained closed, due to the periphery of the disk 37 holding the lug 36' raised and consequently the contacts 35 closed. The call-up machine M at the exchange is now manipulated, and as it is connected toathe main conductor of the jack plug J, through the conductor 95, the conductor 96, the con tacts 97 and 98', and the conductor 99, the call-up alarm 74- in the called set is actuated, While the call-up alarm in the uncalled set contactsifiz, now closed by the pin 29, are shunted from the line and are not affected.-

At the end of the conversation, the placing of the calling and called receivers upon the hooks H, lowers them, opening contacts knows that the conversation is at an end, the jack plugs J are removed from the socket 100 and J, to permit the selecting key K to contacts 62, 64, to step the shaft 11, in all sets to initial position, thus connecting all shunted sets to the line as Well as the called and calling sets.

In Fig, 11, the disk 37, is employed in lieu of the disk 37, the same having the two circumferential grooves 39" and 39*, which correspond to the two faces of the disk 37 for the guidance of the pin 36, the notches 39, corresponding to the notches 39 of the the spaces 3-39" correspond and act similarly to the slots 3!), for the guidance of the pins 36. in that-ailing set.

What is claimed is:

l. The combination, in a telephone suhtacts 35, while the contacts 3:) in all uncalled due to the shunt conductors 76-77 and- 48-49 and 55.-56 and as the exchange disk for the reception of the lug 36", ivhil station, a receiver, a transmitter, a local batthat the pins 36 in the calling set passed lit.

return to initial position and actuate the p 4. menace tery circuit, and a shunting and lock-out device, said last device having a shaft rota tably supported, a paWl-end-ratchet device for operating said shaft, an electromagnetically operated means for actuating said pawl and-ratcbet device to impart to the shaft a'step-by-step movement, means coir trolled by the shaft to open the local battery circuit, and a line shunt for shunting the sub-station from, the line, said shunt and local battery circuit being operated alter nately to be connected and disconnected from the line by the movement of the shaft.

2. In a telephone system, a line controlled relay, and a sub-station having alocal cir cuit, a transmitter and a receiver, a normally open shunt to, when closed, isolate the substation from the line, a pair of co-acting terminals in said shunt, and means for actuating said terminals controlled through the line control relay for opcning and closing said shunt, said means comprising a rotatable shaft, a toothed disk carried by the shaft, and capable of a sliding movement thereon, one of said terminals being normally in contact with the toothed portion of the disk, a lock carried by said terminal ongaging the disk, an clectron'iagnct disposerh to slide the disk to cause the disk to engage the lock of the terminal during the rotation of the shaft and disk ,mcans actuated by the line relav for imparting to the shaft and disk a step-by-step movement, a circuit controlling the last electromagnet, and means operated by the shaft for alternately opening and closing the last circuit, the shaft during its rotation alternately opening and closing the aunt and the last circu it.

3. In a telephone system an ex :hange station and a sub-station connected for the transmission of intelligence, :1 selecting device at the exchange station, a line relay at the sub-station and a normally opened shunt connection"around the sub-station to theline; said sub-station having a transmitter, a receiver, a receiver hook, a local battery circuit, an electromagnet, an open circuit including said electromaguet. said circuit being controlled by the line rela' from the exchange station, a rotatable mecl'ianism con trolled by the electromagnet to open and close the shunt connection, and an elqctro magnet and spring actlmtcd means for (7MP trolling the shunt connection OPJillllg and closing mechanism.

4. Iii a telephone system, an exchange sta tion and a sub-station connected. for the transmission of intelligence, a selecting device at the exchange station, a line at the sub-station and a normally opened shunt connection around the substation to the line; said sub-station having a trzmsmiticr, a receiver, a receiver book, a local baili f,

circuit, an electroma oel', an open circuit including said electromagnet, said circuit being controlled by the line relay from the exchange station, a rotatable mechanism controlled by the electromagnct to open and close the shunt connection, and having a slidable member thereon to regulate the opening and closing of the shunt connection, and circuit including a battery, an electromagnet, and two sets of contacts controlled respectively by the receiver hook and rotatable mechanism to operate the sliding member to regulate the closure of the shunt connection. I

in a telephone system, an exchange station and a sub-station. connected for the transmission of intelligence, a selecting device at the exchange station, a line relay at the substation and a normally opened shunt coimcotion around the substation ,to the line said sub-station having a transmitter, a reeiver, areceiver hook, a local battery circuit, on electrou'iagnet, an open circuit including said electromagnet, said circuit, being controlled by the line relay from the exchange station, a rotatalfle shaft controlled by the electroi'nagnet, a disk slidable thereon and rotatable therewith to open and close the shunt connerztion, and an clectromagnet and spring actuated means. for sliding the dish to ehcct the opening and closing of the shunt connection.

In a telephone system, an exchange station and a substation, connected for the transmission of intcl nce, a selecting device at the exchange station, a line relay at the sub-station a nd a normally opened shunt connection around the substation to the line; said substation having a transmitter, a receiver, a receiver hook, at local battery circuit, an elect-romagnet, an open c rcu t including said clectromagnet, said circuit being controlled by the line relay from the exchange station, a rotatable shaft controlled by the clectromagnct, notched. d sk slidably mounted upon and rotatable With the shaft. the terminals of the shunt connection normally engaging the periphery of the disk, and controlled thereby, and a circuit inchiding a bat-ta an electromagnet-, and. two pairs of contacts controlled 1 spectra" by the l i or heel: and shaft to operate the sliding disk to regrnatc the position oi the disk, relatively to the terminals of the shunt connection.

In testimony that I claim the foregoing my own,,l have hereto afiixed my signature in the presence of two Witnesses.

.rlUBlQN C. M. HA 'llNGS.

31 i tnesses 

